Michael A. Phillips

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Akule Construction

Design:

Big thanks to Anthony Wesley (http://www.acquerra.com.au/astro/) for not only his design but also for his endless, undying help and assistance. He put up with many a question from me on trying to wrap my brain around this. For those less inclined with Newtonian design, we'll start with the tube and retaining ring. The 3x collimation bolts in a threaded into the holes in the ring.

Next is the mirror cell. This holds the mirror in place and allows the collimation bolts to adjust the primaries axial position in the tube. The addition of the cooling unit should not interfere with this operation and in my tests and observations, it does not in this design.

Next we need to find space near the mirror and cell to place the internal fans. The 1st video shows this quite well and provides a unique, 'inside the tube' view.

.080" x 14” square. My buddy Emerson help triangle the edges from a square to octagon. Then we sanded them down to a mostly round shape. The work turned out great, which is good because its hard to get a round metal of that size!

COLD-SIDE fans:

3 x FAN-EC9225M12CA

EverCool 92mm 12V 3-Pin DC Fan

2200RPM

39.35CFM

<25 dBA

1 x FDC08025S1M

80mm

2700±10% RPM

32.95 CFM

26.5 dBA

Here's the mirror cell without fans:

3 on each side of the triangle and one on the center

HOT-SIDE Heat sinks:

3 x Rosewill RCX-Z90-CP 92mm

3000 ±10% RPM

62.5 CFM

26.5 dBA

The challenge with these heat sinks is they are set for a specific computer CPU height. It was too high above the top of the plexiglass so I took some scrap aluminum and poured on the thermal paste.

Fully operating! The noise you hear is actually almost all the 2x 90mm fans that keep the PSU cooler. They're badly jury rigged and my not be necessary, but the power supply is near max capacity with all the 7 fans and 3 Peltiers running.